Grounding Your 1394 System; Grounding Your System To The Subpanel - AB Quality Allen-Bradley 1394 User Manual

3-12 Wiring System, Axis, and Shunt Modules, and Motors (for all systems)

Grounding Your 1394 System

Connect the system
module's PE and each axis
module's PE1 to the PE bar
System module
ground bar
Publication 1394-5.0 — May 2000
We recommend that all equipment and components of a machine or
process system have a common earth ground point connected to their
chassis. A grounded system provides a safety ground path for short
circuit protection. Grounding your modules and panels minimizes
shock hazards to personnel and damage to equipment caused by short
circuits, transient overvoltages, and accidental connection of
energized conductors to the equipment chassis.

Grounding your System to the Subpanel

The National Electrical Code contains grounding requirements,
conventions, and definitions. Follow all applicable local codes and
regulations to safely ground your system. Refer to the illustration
below for details on grounding your system and axis modules. Refer
to Appendix B for interconnect information.
Figure 3.8
PE Safety Ground Configuration with Multiple 1394 Systems on One Panel
22 kW or
5 and 10 kW
Status
System Modules
DANGER
RISK OF ELECTRICAL SHOCK. HIGH VOLTAGE MAY
EXIST UP TO FIVE MINUTES AFTER REMOVING POWER.
(Series A and B)
Bonded PE
ground bar
22 kW or
5 and 10 kW
Status
System Modules
DANGER
RISK OF ELECTRICAL SHOCK. HIGH VOLTAGE MAY (Series C or later)
EXIST UP TO FIVE MINUTES AFTER REMOVING POWER.
System module
ground bar
Status
DANGER
RISK OF ELECTRICAL SHOCK. HIGH VOLTAGE MAY
EXIST UP TO FIVE MINUTES AFTER REMOVING POWER.
All ground wiring must
comply with local codes
Status
DANGER
RISK OF ELECTRICAL SHOCK. HIGH VOLTAGE MAY
EXIST UP TO FIVE MINUTES AFTER REMOVING POWER.
Bonded cabinet ground bus
Always follow NEC and
applicable local codes
Ground grid or power
distribution ground